Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
2000-01-27
2003-05-20
Dees, Jose′ G. (Department: 1616)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S059000, C424S061000, C424S063000, C424S064000, C424S065000, C424S070100, C424S070700, C424S070120, C424S400000, C424S401000
Reexamination Certificate
active
06565862
ABSTRACT:
The present invention relates to a transfer-resistant cosmetic composition for caring for and/or making up human hair, skin, nails, and/or lips, which imparts both mattifying and freshness properties. In particular, the invention relates to a lip composition, e.g., a lipstick, an eyeliner, a face powder, an eyeshadow, a foundation, an antisun product, a deodorant, or a treating shampoo, which may be in the form of an aqueous gel, lotion, or cream, or cast as a stick or as a disk.
By “mattifying” is meant the creation of a matte effect or finish. A matte effect is particularly desired for users with combination or greasy skin, in particular in hot and humid climates. Mattifying fillers are generally absorbent fillers, such as talc, silica or kaolin, or fillers exhibiting light scattering optical properties, which properties are referred to as a “soft-focus effect”.
Lip and foundation compositions according to the prior art generally comprise fatty substances, such as oils, pasty compounds and waxes, and a particulate phase which is generally composed of fillers and pigments. The fillers generally serve to modify the texture of the composition and to mattify the film or layer of composition deposited on the skin and/or lips, whereas the pigments are generally used to contribute color to the composition. Recently, use has been made of mattifying polymers (see, for example, European patent application EP-A-790,055), such as crosslinked silicone polymers known under the commercial references KSG (KSG 6, 16, 17 and 18) from the company Shin Etsu, Tréfils from the company Dow Corning, or Gransils from the company Grand Industrie.
(KSG 6, 16, 17 and 18) from the company Shin Etsu, Tréfils from the company Dow Corning, or Gransils from the company Grand Industrie.
The disadvantage of these commercial products is that they comprise linear or cyclic silicone oils of the noncrosslinked polydimethylsiloxanes (PDMS) type and that they contribute an oily and greasy effect, without a fresh effect, which does not allow them to be used, or allows them to be used with difficulty, in a hot and humid environment by users with greasy skin. Furthermore, these commercial products, even those devoid of silicone oil, Tréfils 505 C from Dow Dorning, for example, are difficult to disperse in an aqueous medium. These products are presented as “water-insoluble” elastomeric silicone polymers. See in particular the European patent application in the name of Kao, EP-A-0,855,178.
These polymers, which are difficult to incorporate in an aqueous phase, are completely water repellent. Due to their high incompatibility with water, and in particular with sweat, the latter is not absorbed by these polymers and even has a tendency to “pearl” at the surface of the skin during perspiration. The mattifying effect of these polymers, therefore, has a tendency to fade over time. Recently, emulsions comprising this type of polymer have been devised (see, for example, U.S. Pat. No. 5,412,004, to Tachibana, et al., and U.S. Pat. No. 5,599,533, to Stepniewski, et al.) for the purpose of improving their cosmetic properties. These stable emulsions, although contributing less greasiness and more freshness than anhydrous products, also lose the mattifying property initially contributed by the crosslinked silicone polymers.
There exist compounds of the crosslinked organosiloxane type which disperse in aqueous media, such as, for example, the compounds of KSG 20 or KSG 21 type sold by the company Shin Etsu. It is the specific chemical structure of these compounds which is responsible for this dispersion in aqueous medium, i.e., the presence of polar groups conferring surface-active properties on them. However, these known compounds, in contrast to those of the composition of the invention, do not contribute the desired matte effect.
Furthermore, known foundation and/or lip compositions, when they are applied to the skin or lips, exhibit the disadvantage of transferring. By “transferring”, it is meant that the composition is at least partly deposited, leaving marks on certain surfaces with which the applied composition may be brought into contact, such as, for example, a glass, a cup, a cigarette, an item of clothing, or the skin. This results in a mediocre persistence of the applied film on the skin or lips, requiring regular renewal of the application of the foundation or lip composition by the user. Furthermore, the appearance of these unacceptable marks, in particular on blouse collars, can dissuade some women from using this type of makeup composition.
As a result, cosmetic scientists have been interested in “transfer-free” lip and foundation compositions for several years. By “transfer-free”, or “transfer-resistant”, it is meant a composition, in particular a cosmetic composition, which transfers little or not at all. Thus, the company Shiseido has envisaged, in its Japanese patent application JP-A-61-65809, “transfer-free” lip compositions comprising from 1 to 70% by weight of a siloxysilicate resin (with a three-dimensional network) comprising pendant alkyl chains comprising from 1 to 6 carbon atoms or pendant phenyl chains, from 10 to 98% by weight of a volatile silicone oil with a cyclic silicone chain, and pulverulent fillers. Likewise, the company Noevier has disclosed, in its Japanese patent application JP-A-62-61911, “transfer-free” lip compositions, eyeliner, and foundation compositions comprising one or more volatile silicones in combination with one or more hydrocarbonaceous waxes.
More recently, the company Revlon has envisaged, in its European patent application EP-A-602,905, “transfer-free” lip compositions comprising a cyclic or linear volatile silicone with pendant methyl chains, and a silicone resin comprising a pendant ester chain having from 12 to 18 carbon atoms. However, the lip film remaining on the lips after evaporation of the volatile silicone has the disadvantage of lacking comfort on application, and in particular of being too dry. In addition, Revlon has envisaged, in its European patent application EP-A-709,083, “transfer-free” foundations comprising a volatile silicone in combination with a siloxysilicate resin. These foundations also exhibit the disadvantage of not being very comfortable and of being dry over time.
These compositions, although entirely satisfactory with regard to the “transfer-free” property, exhibit the disadvantage of leaving on the lips, after evaporation of the silicone oils, a film which becomes uncomfortable over time (feeling of dryness and tightness), thus dissuading a number of women from using this type of makeup product. To improve the comfort of this type of composition, it might be possible to add nonvolatile oils, but, in this case, there would be a loss in “transfer-free” effectiveness.
Accordingly, the need remains for a mattifying composition with properties which persist on the skin over time, i.e., have little or no transferability, and which at the same time contribute properties of freshness.
A subject of the present invention, therefore, is a care or makeup composition which makes it possible to overcome the various disadvantages set forth above, and which makes it possible in particular to obtain a film which does not transfer, which composition exhibits improved cosmetic properties with respect to those of the “transfer-free” products of the prior art, in particular the properties of slip or ease of application, of nontightness and of nondryness of the lips, and mattifying and freshness properties which are superior to those of the mattifying products of the prior art. The invention applies not only to products for making up human lips and skin, but also to products for caring for and/or for treating human lips and skin. The composition of the invention can also be applied to the hair and scalp.
Thus, a subject of the invention is a mattifying and/or transfer-resistant composition for making up or caring for keratinous materials, including the hair, skin, nails, and lips, comprising, as a thickener, particles of an at least partially crosslinked elastomeri
Dees Jose′ G.
Finnegan Henderson Farabow Garrett & Dunner LLP
L'Oreal (S.A.)
Lamm Marina
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